钢轨打磨型面参数设计研究
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摘要
随着运量的不断提高以及对列车更高的速度要求,对铁路轨道结构的要求也随之不断提高,作为与车轮直接接触的钢轨则扮演了其最重要的角色,但重载、高速又使得钢轨出现了不可避免的各类磨耗伤损和病害,如何解决钢轨由于磨耗等引发的一系列伤损及病害问题成为整个铁路维护中的一个重要研究方向。
     目前主要是通过对钢轨打磨、涂油、引进国外先进的打磨设备以及采用先进的钢轨生产工艺等手段来解决此类磨耗问题,结合成灌线实例,本文结合轮轨磨耗机理从钢轨型面设计方面对钢轨打磨技术进行研究,有目的性地对钢轨的型面参数进行控制,从而达到改善轮轨接触性能的目的。
     本文通过对钢轨磨耗问题以及目前国内外钢轨打磨技术现状等进行了阐述,并对成都局管辖内的成灌线、成遂线以及宝成线的钢轨及车轮型面以及磨耗等各类伤损的调查分析,结合软件的计算分析,以成灌线为例对钢轨的型面进行了设计,提出了最优的钢轨轮廓面。针对目前的铁路现状,对钢轨型面设计理念进行了阐述,建立了一套较为合理的轮轨型面设计方法,并给出了轮轨型面设计的技术路线,为钢轨的打磨和铁路线路的维护提供了一定的理论支撑。
With the increasing railway traffic volume, the higher demand for train speed results in the increasing demand for railway track structure. The rail reacting with wheel directly plays an important role in maintaining the track safety, stability and durability. Due to the heavy haul and high-speed railway, different kinds of rail diseases like abrasion occur inevitability. How to solve the problem of rail diseases caused by abrasion is becoming an important research subject in the field of railway maintainance.
     Currently, to lessen the rail abrasion depends on rail polishing, fat liquoring as well as the application of brought-in overseas advanced polishing equipments and rail productive technologies. In relation to the Chengdu-Dujiangyan passenger dedicated line, based on the mechanism of wheel-rail abrasion, the rail polishing technology is studied in terms of the rail profile design. And the parameters of the rail profile are purposefully controlled, thus improving the wheel-rail contact performance.
     The status quo of rail abrasion and the rail polishing technologies at home and abroad was elaborated in the paper. Besides, the various diseases of rail and wheel profile with its abrasion included on the Chengdu-Dujiangyan railway line, Chengdu-Suining railway line and Baoji-Chengdu railway line managed by Chengdu Railway Bureau were investigated and analyzed. With the application of computer software, the rail profile on the Chengu-Dujiangyan railway line was designed to propose the optimum rail profile. Additionally, aiming at the current situation of railway, the concept of rail profile design was expounded. Furthermore, a set of relatively reasonable wheel-rail profile design method was established and the technical route of wheel-rail profile design was proposed, which, to some extent, provides the theoretical support for rail polishing and railway maintainance.
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